Investigation of phase evolution and control over phase transformation temperature and thermal hysteresis using stoichiometry and co-doping in VO2 thin films

Investigation of phase evolution and control over phase transformation temperature and thermal hysteresis using stoichiometry and co-doping in VO2 thin films

Structural phase transition temperature and its associated hysteresis in VO2 have been controlled by high valent dopant induced local structural modification which acts as phase nucleation site during phase transformation. Monoclinic phase intensity loops plotted against temperature has been observe...

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Bibliographic Details
Main Authors: G. Hassnain Jaffari, Wardah Mahmood
Format: Article
Language:English
Published: AIP Publishing LLC 2017-11-01
Series:AIP Advances
Online Access:http://dx.doi.org/10.1063/1.5003964
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spelling doaj-46c6b4981e474bc58438fa169c37f1312020-11-24T22:32:30ZengAIP Publishing LLCAIP Advances2158-32262017-11-01711115312115312-810.1063/1.5003964056711ADVInvestigation of phase evolution and control over phase transformation temperature and thermal hysteresis using stoichiometry and co-doping in VO2 thin filmsG. Hassnain Jaffari0Wardah Mahmood1Department of physics, Quaid-i-Azam University, Islamabad 45320, PakistanDepartment of physics, Quaid-i-Azam University, Islamabad 45320, PakistanStructural phase transition temperature and its associated hysteresis in VO2 have been controlled by high valent dopant induced local structural modification which acts as phase nucleation site during phase transformation. Monoclinic phase intensity loops plotted against temperature has been observed to exhibit thermal hysteresis. It is shown that the size, shape and central position of hysteresis loop depend on stoichiometry and doping concentration. Highest reduction in phase transformation temperature and thermal hysteresis width has been observed in case of W+6-Mo+6 co-doping and W+6 doping, respectively. Hence energy barrier associated with the structural phase transition has been successfully manipulated to vary Tc and hysteresis width. These findings have implications for designing the phase switching devices and smart window applications.http://dx.doi.org/10.1063/1.5003964
collection DOAJ
language English
format Article
sources DOAJ
author G. Hassnain Jaffari
Wardah Mahmood
spellingShingle G. Hassnain Jaffari
Wardah Mahmood
Investigation of phase evolution and control over phase transformation temperature and thermal hysteresis using stoichiometry and co-doping in VO2 thin films
AIP Advances
author_facet G. Hassnain Jaffari
Wardah Mahmood
author_sort G. Hassnain Jaffari
title Investigation of phase evolution and control over phase transformation temperature and thermal hysteresis using stoichiometry and co-doping in VO2 thin films
title_short Investigation of phase evolution and control over phase transformation temperature and thermal hysteresis using stoichiometry and co-doping in VO2 thin films
title_full Investigation of phase evolution and control over phase transformation temperature and thermal hysteresis using stoichiometry and co-doping in VO2 thin films
title_fullStr Investigation of phase evolution and control over phase transformation temperature and thermal hysteresis using stoichiometry and co-doping in VO2 thin films
title_full_unstemmed Investigation of phase evolution and control over phase transformation temperature and thermal hysteresis using stoichiometry and co-doping in VO2 thin films
title_sort investigation of phase evolution and control over phase transformation temperature and thermal hysteresis using stoichiometry and co-doping in vo2 thin films
publisher AIP Publishing LLC
series AIP Advances
issn 2158-3226
publishDate 2017-11-01
description Structural phase transition temperature and its associated hysteresis in VO2 have been controlled by high valent dopant induced local structural modification which acts as phase nucleation site during phase transformation. Monoclinic phase intensity loops plotted against temperature has been observed to exhibit thermal hysteresis. It is shown that the size, shape and central position of hysteresis loop depend on stoichiometry and doping concentration. Highest reduction in phase transformation temperature and thermal hysteresis width has been observed in case of W+6-Mo+6 co-doping and W+6 doping, respectively. Hence energy barrier associated with the structural phase transition has been successfully manipulated to vary Tc and hysteresis width. These findings have implications for designing the phase switching devices and smart window applications.
url http://dx.doi.org/10.1063/1.5003964
work_keys_str_mv AT ghassnainjaffari investigationofphaseevolutionandcontroloverphasetransformationtemperatureandthermalhysteresisusingstoichiometryandcodopinginvo2thinfilms
AT wardahmahmood investigationofphaseevolutionandcontroloverphasetransformationtemperatureandthermalhysteresisusingstoichiometryandcodopinginvo2thinfilms
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